Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A transmitter, comprising: a demultiplexer configured to demultiplex a data subcarrier, and a training sequence or a pilot subcarrier included in a signal which needs to be frequency-shifted among a plurality of signals; a frequency shift unit configured to frequency-shift the demultiplexed data subcarrier based on a predetermined frequency; a superposition unit configured to generate a polarization signal by superimposing the demultiplexed training sequence or pilot subcarrier, and the frequency-shifted data subcarrier; and a polarization antenna configured to transmit a signal which need not be frequency-shifted and the generated polarization signal, among the plurality of signals.
This invention relates to wireless communication systems, specifically addressing the challenge of efficiently transmitting multiple signals with different frequency requirements using polarization diversity. The system includes a transmitter designed to handle signals that require frequency-shifting alongside those that do not. A demultiplexer separates a data subcarrier and a training or pilot subcarrier from the input signal. The data subcarrier is then frequency-shifted by a predetermined amount using a frequency shift unit. Meanwhile, the training or pilot subcarrier remains unmodified. A superposition unit combines the frequency-shifted data subcarrier with the unshifted training or pilot subcarrier to generate a polarization signal. The transmitter then uses a polarization antenna to transmit both the polarization signal and any other signals that do not require frequency-shifting. This approach optimizes signal transmission by leveraging polarization diversity to handle multiple signals with varying frequency requirements, improving spectral efficiency and reducing interference in wireless communication networks.
2. The transmitter of claim 1 , wherein the plurality of signals includes: a first signal including a first data subcarrier, and a first training sequence or a first pilot subcarrier which need not be frequency-shifted; and a second signal including a second data subcarrier which needs to be frequency-shifted, and a second training sequence or a second pilot subcarrier which need not be frequency-shifted.
A transmitter system is designed to handle multiple signals in a wireless communication environment where some signals require frequency shifting while others do not. The system processes a first signal containing a data subcarrier and either a training sequence or a pilot subcarrier, neither of which requires frequency shifting. Simultaneously, it processes a second signal that includes a data subcarrier that must be frequency-shifted, along with a training sequence or pilot subcarrier that does not require frequency shifting. This configuration allows the transmitter to efficiently manage signals with different frequency requirements, optimizing performance in scenarios where some subcarriers must be adjusted for alignment or interference mitigation while others remain unchanged. The system ensures proper synchronization and signal integrity by selectively applying frequency shifts only where necessary, reducing complexity and power consumption. This approach is particularly useful in multi-carrier communication systems where different subcarriers may have varying propagation conditions or interference profiles.
3. The transmitter of claim 1 , further comprising: a modulator configured to generate the plurality of signals including the training sequence or the pilot subcarrier, and the data subcarrier.
This invention relates to wireless communication systems, specifically to a transmitter designed to improve signal transmission efficiency and reliability. The transmitter generates multiple signals, including a training sequence or pilot subcarrier and a data subcarrier, to facilitate accurate signal detection and demodulation at the receiver. The training sequence or pilot subcarrier is used for channel estimation, synchronization, and calibration, while the data subcarrier carries the actual information to be transmitted. The modulator within the transmitter is configured to generate these signals, ensuring proper modulation of both the training/pilot and data components. This design enhances signal integrity by providing reference points for the receiver to compensate for channel distortions and noise, thereby improving overall communication performance. The transmitter may be part of a broader system, such as a wireless network or a point-to-point communication link, where reliable data transmission is critical. The invention addresses challenges in maintaining signal quality in dynamic wireless environments by incorporating structured reference signals alongside data, enabling robust demodulation and error correction.
4. The transmitter of claim 1 , wherein the polarization antenna includes: a vertical polarization antenna configured to transmit any one signal of the signal which need not be frequency-shifted and the generated polarization signal; and a horizontal polarization antenna configured to transmit another one signal of the signal which need not be frequency-shifted and the generated polarization signal.
This invention relates to wireless communication systems, specifically improving signal transmission efficiency by utilizing dual-polarized antennas. The problem addressed is the inefficient use of spectrum resources in traditional single-polarized antenna systems, which limits data throughput and reliability. The invention describes a transmitter with a polarization antenna system that includes both vertical and horizontal polarization antennas. The vertical polarization antenna is configured to transmit either a signal that does not require frequency shifting or a generated polarization signal. Similarly, the horizontal polarization antenna is configured to transmit the other signal that does not require frequency shifting or the generated polarization signal. This dual-polarized approach allows for simultaneous transmission of multiple signals, enhancing spectral efficiency and reducing interference. The system leverages polarization diversity to maximize data throughput by transmitting different signals on orthogonal polarization planes. The generated polarization signal is derived from combining or processing input signals to optimize transmission characteristics. This configuration enables higher data rates and improved signal quality in wireless communication networks, particularly in environments with limited spectrum availability. The invention is applicable to various wireless technologies, including 5G and beyond, where efficient spectrum utilization is critical.
5. The transmitter of claim 1 , wherein the polarization antenna transmits the training sequence and the data subcarrier included in each of the signal which need not be frequency-shifted and the generated polarization signal as separate symbols, respectively, or combines the training sequence and the data subcarrier as one symbol to be transmitted.
This invention relates to wireless communication systems, specifically improving signal transmission efficiency in polarization-based communication. The problem addressed is the need for efficient transmission of training sequences and data subcarriers in polarized signals, particularly in systems where frequency shifting may not be required or desirable. The invention involves a transmitter with a polarization antenna that handles training sequences and data subcarriers in two distinct ways. First, the transmitter can send the training sequence and data subcarrier as separate symbols in the transmitted signal, without requiring frequency shifting. Alternatively, the transmitter can combine the training sequence and data subcarrier into a single symbol for transmission. The polarization antenna generates a polarization signal that carries these sequences, either separately or combined, depending on the chosen transmission mode. This flexibility allows for optimized signal processing in different communication scenarios, improving reliability and efficiency in polarized signal transmission. The system ensures compatibility with various modulation schemes and enhances data throughput by reducing redundant transmissions.
6. A receiver, comprising: a polarization antenna configured to receive a plurality of signals each including a first data subcarrier which is not frequency-shifted and a frequency-shifted second data subcarrier; a selector configured to demultiplex a second data subcarrier, and a second training sequence or a second pilot subcarrier included in a signal including the frequency-shifted second data subcarrier among the plurality of received signals; a frequency shift unit configured to frequency-shift the demultiplexed second data subcarrier based on a predetermined frequency, to transform the demultiplexed second data subcarrier to an original second data subcarrier before being frequency-shifted; and a demodulator configured to demodulate the signal including the first data subcarrier, which is not frequency-shifted, received through the polarization antenna, the demultiplexed second training sequence or second pilot subcarrier, and the transformed original second data subcarrier.
This invention relates to wireless communication systems, specifically addressing challenges in receiving and processing signals with frequency-shifted subcarriers. The system includes a polarization antenna that receives multiple signals, each containing a first data subcarrier (unshifted) and a frequency-shifted second data subcarrier. A selector demultiplexes the frequency-shifted second data subcarrier and extracts either a second training sequence or a second pilot subcarrier from the signal containing the shifted subcarrier. A frequency shift unit then reverses the frequency shift applied to the second data subcarrier, restoring it to its original state before the shift. Finally, a demodulator processes the unshifted first data subcarrier, the extracted training or pilot subcarrier, and the restored second data subcarrier to reconstruct the original signal. This approach enables efficient handling of frequency-shifted subcarriers in multi-carrier communication systems, improving signal integrity and data recovery. The invention is particularly useful in scenarios where subcarrier frequency shifting is employed to mitigate interference or enhance spectral efficiency.
7. The receiver of claim 6 , wherein the polarization antenna includes: a vertical polarization antenna configured to receive any one signal of a first signal including the first data subcarrier which is not frequency-shifted and a second signal including the second data subcarrier which is frequency-shifted; and a horizontal polarization antenna configured to receive the other one signal of the first signal and the second signal.
This invention relates to wireless communication systems, specifically to a receiver with a polarization antenna system designed to handle signals with different polarization states and frequency shifts. The problem addressed is the efficient reception of signals that may be transmitted with different polarizations and frequency shifts, which can complicate signal processing in conventional receivers. The receiver includes a polarization antenna system with both vertical and horizontal polarization antennas. The vertical polarization antenna is configured to receive either a first signal containing a first data subcarrier that is not frequency-shifted or a second signal containing a second data subcarrier that is frequency-shifted. The horizontal polarization antenna is configured to receive the remaining signal, meaning if the vertical antenna receives the first signal, the horizontal antenna receives the second signal, and vice versa. This dual-polarization approach allows the receiver to distinguish between the two signals based on their polarization and frequency characteristics, improving signal separation and reducing interference. The system ensures that the receiver can accurately demodulate both signals regardless of their polarization or frequency shift, enhancing communication reliability in environments where signals may be transmitted with varying polarization states. This is particularly useful in systems where signal integrity is critical, such as in high-density wireless networks or applications requiring robust data transmission.
8. A method for controlling a transmitter, the method comprising: generating a first signal including a first data subcarrier and a first training sequence or a first pilot subcarrier which need not be frequency-shifted, and a second signal including a second data subcarrier which needs to be frequency-shifted and a second training sequence or a second pilot subcarrier which need not be frequency-shifted, through a modulator; demultiplexing the second data subcarrier, and the second training sequence or the second pilot subcarrier which need to be frequency-shifted, which are included in the second signal, through a demultiplexer; frequency-shifting the demultiplexed second data subcarrier based on a predetermined frequency, through a frequency shift unit; generating a polarization signal by superimposing the demultiplexed second training sequence or second pilot subcarrier and the frequency-shifted second data subcarrier, through a superposition unit; and transmitting each of the first signal which need not be frequency-shifted and the generated polarization signal, through a polarization antenna.
This invention relates to wireless communication systems, specifically methods for controlling a transmitter to handle signals with different frequency-shifting requirements. The problem addressed is the efficient transmission of signals where some components require frequency-shifting while others do not, optimizing signal integrity and transmission efficiency. The method involves generating two distinct signals. The first signal includes a data subcarrier and a training or pilot subcarrier that do not require frequency-shifting. The second signal contains a data subcarrier that must be frequency-shifted and a training or pilot subcarrier that does not require shifting. Both signals are produced by a modulator. The second signal is then processed by demultiplexing its components, separating the frequency-shifted data subcarrier from the unshifted training or pilot subcarrier. The data subcarrier undergoes frequency-shifting based on a predetermined frequency, while the training or pilot subcarrier remains unchanged. These components are then recombined into a polarization signal. Finally, the first signal (unchanged) and the generated polarization signal are transmitted via a polarization antenna, ensuring proper signal separation and transmission. This approach improves signal quality and reduces interference in wireless communication systems.
9. The method of claim 8 , wherein the transmitting of each of the first signal and the generated polarization signal includes: transmitting the first signal, which need not be frequency-shifted, through any one antenna of a vertical polarization antenna and a horizontal polarization antenna, which are included in the polarization antenna; and transmitting the generated polarization signal through the other one antenna of the vertical polarization antenna and the horizontal polarization antenna.
This invention relates to wireless communication systems, specifically methods for transmitting signals with different polarizations to improve communication reliability and efficiency. The problem addressed is the need for robust signal transmission in environments where multipath fading or interference degrades performance. The solution involves using a polarization antenna system that includes both vertical and horizontal polarization antennas to transmit signals with distinct polarization states. The method involves generating a polarization signal by modifying a first signal, such as by applying a phase shift or other transformation. The first signal, which may or may not be frequency-shifted, is transmitted through one of the polarization antennas (either vertical or horizontal). The generated polarization signal is then transmitted through the other polarization antenna. This dual-polarization transmission enhances signal diversity, reducing the impact of fading and improving reception quality. The system dynamically selects which signal is transmitted through which antenna, optimizing performance based on channel conditions. This approach leverages polarization diversity to mitigate interference and improve data throughput in wireless communication systems.
10. A method for controlling a receiver, the method comprising: receiving a plurality of signals each including a first data subcarrier which is not frequency-shifted and a frequency-shifted second data subcarrier, through a polarization antenna; demultiplexing a second data subcarrier, and a first training sequence or a second pilot subcarrier which are included in a signal including the frequency-shifted second data subcarrier among the plurality of received signals, through a selector; frequency-shifting the demultiplexed second data subcarrier based on a predetermined frequency, to transform the demultiplexed second data subcarrier to an original second data subcarrier, through a frequency shift unit; and demodulating the signal including the first data subcarrier which is not frequency-shifted, received through the polarization antenna, and the first training sequence or the first pilot subcarrier, the demultiplexed second training sequence or second pilot subcarrier, and the transformed original second data subcarrier, through a demodulator.
This invention relates to signal processing in wireless communication systems, specifically for controlling a receiver that handles signals with frequency-shifted and non-frequency-shifted subcarriers. The problem addressed is the efficient demodulation of signals containing both frequency-shifted and non-frequency-shifted data subcarriers, along with training sequences or pilot subcarriers, to improve signal reception and data recovery. The method involves receiving multiple signals through a polarization antenna, where each signal includes a first data subcarrier that remains unshifted and a second data subcarrier that has been frequency-shifted. A selector demultiplexes the second data subcarrier, along with either a first training sequence or a second pilot subcarrier, from the signals that include the frequency-shifted second data subcarrier. The demultiplexed second data subcarrier is then frequency-shifted back to its original state using a predetermined frequency in a frequency shift unit. The receiver demodulates the original signal containing the non-frequency-shifted first data subcarrier, along with the first training sequence or first pilot subcarrier, the demultiplexed second training sequence or second pilot subcarrier, and the restored original second data subcarrier. This process ensures accurate recovery of both data subcarriers and associated reference signals, enhancing communication reliability.
Unknown
January 9, 2018
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.